|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | The levels, sources and reactivity of volatile organic compounds in a typical urban area of Northeast China显示文摘Air concentrations of volatile organic compounds(VOCs) were continually measured at a monitoring site in Shenyang from 20 August to 16 September 2017. The average concentrations of alkanes, alkenes, aromatics and carbonyls were 28.54, 6.30, 5.59 and9.78 ppbv, respectively. Seven sources were identified by the Positive Matrix Factorization model based on the measurement data of VOCs and CO. Vehicle exhaust contributed the most(36.15%) to the total propene-equivalent concentration of the measured VOCs,followed by combustion emission(16.92%), vegetation emission and secondary formation(14.33%), solvent usage(10.59%), petrochemical industry emission(9.89%), petrol evaporation(6.28%), and liquefied petroleum gas(LPG) usage(5.84%). Vehicle exhaust, solvent usage and combustion emission were found to be the top three VOC sources for O_3 formation potential, accounting for 34.52%, 16.55% and 11.94%, respectively. The diurnal variation of the total VOCs from each source could be well explained by their emission characteristics,e.g., the two peaks of VOC concentrations from LPG usage were in line with the cooking times for breakfast and lunch. Wind rose plots of the VOCs from each source could reveal the possible distribution of the sources around the monitoring site. The O_3 pollution episodes during the measurement period were found to be coincident with the elevation of VOCs, which was mainly due to the air parcel from the southeast direction where petrochemical industry emission was found to be dominant, suggesting that the petrochemical industry emission from the southeast was probably a significant cause of O_3 pollution in Shenyang. | Zhuobiao Ma Chengtang Liu Chenglong Zhang Pengfei Liu Can Ye Chaoyang Xue Di Zhao Jichen Sun Yiming Du Fahe Chai Yujing Mu | 2019 | Journal of Environmental Sciences2019，31，5： | 12 |
| 2 | Current Status and Future Challenges of Weather Radar Polarimetry: Bridging the Gap between Radar Meteorology/Hydrology/Engineering and Numerical Weather Prediction显示文摘After decades of research and development, the WSR-88 D(NEXRAD) network in the United States was upgraded with dual-polarization capability, providing polarimetric radar data(PRD) that have the potential to improve weather observations,quantification, forecasting, and warnings. The weather radar networks in China and other countries are also being upgraded with dual-polarization capability. Now, with radar polarimetry technology having matured, and PRD available both nationally and globally, it is important to understand the current status and future challenges and opportunities. The potential impact of PRD has been limited by their oftentimes subjective and empirical use. More importantly, the community has not begun to regularly derive from PRD the state parameters, such as water mixing ratios and number concentrations, used in numerical weather prediction(NWP) models.In this review, we summarize the current status of weather radar polarimetry, discuss the issues and limitations of PRD usage, and explore potential approaches to more efficiently use PRD for quantitative precipitation estimation and forecasting based on statistical retrieval with physical constraints where prior information is used and observation error is included. This approach aligns the observation-based retrievals favored by the radar meteorology community with the model-based analysis of the NWP community. We also examine the challenges and opportunities of polarimetric phased array radar research and development for future weather observation. | Guifu ZHANG Vivek N.MAHALE Bryan J.PUTNAM Youcun QI Qing CAO ANDrew D.BYRD Petar BUKOVCIC Dusan S.ZRNIC Jidong GAO Ming XUE Youngsun JUNG Heather D.REEVES Pamela L.HEINSELMAN AlexANDer RYZHKOV Robert D.PALMER Pengfei ZHANG Mark WEBER Greg M.MCFARQUHAR Berrien MOORE III Yan ZHANG Jian ZHANG J.VIVEKANANDAN Yasser AL-RASHID Richard L.ICE Daniel S.BERKOWITZ Chong-chi TONG Caleb FULTON Richard J.DOVIAK | 2019 | Advances in Atmospheric Sciences2019，36，6： | 9 |
| 3 | LICOM Model Datasets for the CMIP6 Ocean Model Intercomparison Project显示文摘The datasets of two Ocean Model Intercomparison Project(OMIP)simulation experiments from the LASG/IAP Climate Ocean Model,version 3(LICOM3),forced by two different sets of atmospheric surface data,are described in this paper.The experiment forced by CORE-II(Co-ordinated Ocean–Ice Reference Experiments,Phase II)data(1948–2009)is called OMIP1,and that forced by JRA55-do(surface dataset for driving ocean–sea-ice models based on Japanese 55-year atmospheric reanalysis)data(1958–2018)is called OMIP2.First,the improvement of LICOM from CMIP5 to CMIP6 and the configurations of the two experiments are described.Second,the basic performances of the two experiments are validated using the climatological-mean and interannual time scales from observation.We find that the mean states,interannual variabilities,and long-term linear trends can be reproduced well by the two experiments.The differences between the two datasets are also discussed.Finally,the usage of these data is described.These datasets are helpful toward understanding the origin system bias of the fully coupled model. | Pengfei LIN Zhipeng YU Hailong LIU Yongqiang YU Yiwen LI Jirong JIANG Wei XUE Kangjun CHEN Qian YANG Bowen ZHAO Jilin WEI Mengrong DING Zhikuo SUN Yaqi WANG Yao MENG Weipeng ZHENG Jinfeng MA | 2020 | Advances in Atmospheric Sciences2020，37，3： | 9 |
| 4 | Dual-Mode Induction of Tunable Circularly Polarized Luminescence from Chiral Metal-Organic Frameworks显示文摘The general approach for fabricating solid-state materials showing circularly polarized luminescence(CPL)is still in its challenge.In this work,chiral metal-organic frameworks(MOFs)with full-color and white-color circularly polarized light emission are firstly achieved through a host-guest emitter-loading strategy.Chiral zeolitic imidazolate frameworks(ZIFs,a class of MOFs)are fabricated by a facile and simple mixed-ligand coassembly pathway.Meantime,achiral dyes,quantum dots(QDs),and upconversion nanoparticles(UCNPs)are easily loaded into the chiral ZIFs during the synthetic process.Size-matched dyes can be solely encapsulated into the chiral cages of ZIF,resulting in induced CPL and enhanced luminescence efficiency in solid-state ZIF⊃dye composites.Large-sized QDs,after embedding into the gap of the ZIF particles,also exhibited intense CPL activity.Furthermore,through modulating the blending ratio of colored dyes or QDs in chiral ZIFs,white light-emitting ZIFs with circular polarization could be constructed in a solid state.In addition,through loading rare earth element-based upconversion nanoparticles(UCNPs)into chiral ZIFs,upconverted CPL(UC-CPL)could be achieved with a high dissymmetry factor(glum).Thus,various achiral luminophores were endowed with CPL upon coupling with chiral ZIFs,which significantly deepened and enlarged the research scope of the chiroptical materials in a solid state. | Tonghan Zhao Jianlei Han Xue Jin Minghao Zhou Yan Liu Pengfei Duan Minghua Liu | 2020 | Research2020，，1： | 8 |
| 5 | Safety and efficacy of stent-assisted coiling for acutely ruptured wide-necked intracranial aneurysms:comparison of LVIS stents with laser-cut stents显示文摘Background:To compare the safety and efficacy of LVIS stent-assisted coiling with those of laser-cut stent-assisted coiling for the treatment of acutely ruptured wide-necked intracranial aneurysms.Methods:Patients with acutely ruptured wide-necked intracranial aneurysms treated with LVIS stent-assisted coiling(LVIS stent group)and laser-cut stent-assisted coiling(laser-cut stent group)were retrospectively reviewed from January 2014 to December 2017.Propensity score matching was used to adjust for potential differences in age,sex,aneurysm location,aneurysm size,neck width,Hunt-Hess grade,and modified Fisher grade.Perioperative procedure-related complications and clinical and angiographic follow-up outcomes were compared.Univariate and multivariate analyses were performed to determine the associations between procedure-related complications and potential risk factors.Results:A total of 142 patients who underwent LVIS stent-assisted coiling and 93 patients who underwent laser-cut stent-assisted coiling were enrolled after 1:2 propensity score matching.The angiographic follow-up outcomes showed that the LVIS stent group had a slightly higher complete occlusion rate and lower recurrence rate than the laser-cut stent group(92.7%vs 80.6%;3.7%vs 9.7%,P=0.078).The clinical outcomes at discharge and follow-up between the two groups demonstrated no significant differences(P=0.495 and P=0.875,respectively).The rates of intraprocedural thrombosis,postprocedural thrombosis,postoperative early rebleeding,and procedure-related death were 0.7%(1/142),1.4%(2/142),2.8%(4/142),and 2.1%(3/142)in the LVIS stent group,respectively,and 4.3%(4/93),2.2%(2/93),1.1%(1/93),and 3.2%(3/93)in the laser-cut stent group,respectively(P=0.082,0.649,0.651,and 0.683).Nevertheless,the rates of overall procedure-related complications and intraprocedural rupture in the LVIS stent group were significantly lower than those in the laser-cut stent group(5.6%vs 14.0%,P=0.028;0.7%vs 6.5%,P=0.016).Multivariate analysis showed that laser-cut stent-assisted coiling was an independent predictor for overall procedurerelated complications(OR=2.727,P=0.037);a history of diabetes(OR=7.275,P=0.027)and other cerebrovascular diseases(OR=8.083,P=0.022)were independent predictors for ischemic complications,whereas none of the factors were predictors for hemorrhagic complications.Conclusions:Compared with laser-cut stent-assisted coiling,LVIS stent-assisted coiling for the treatment of acutely ruptured wide-necked intracranial aneurysms could reduce the rates of overall procedure-related complications and intraprocedural rupture. | Gaici Xue Qiao Zuo Xiaoxi Zhang Haishuang Tang Rui Zhao Qiang Li Yibin Fang Pengfei Yang Bo Hong Yi Xu Qinghai Huang Jianmin Liu | 2021 | Chinese Neurosurgical Journal2021，7，2： | 8 |
| 6 | Flavonoid content and radical scavenging activity in fruits of Chinese dwarf cherry(Cerasus humilis) genotypes显示文摘The Chinese dwarf cherry(Cerasus humilis(Bge.) Sok.) is a small shrub with edible fruits. It is native to northern and western China. This species was included as a medicinal plant in the ‘‘Chinese Pharmacopeia'' and has emerged as an economically important crop for fresh fruit consumption, processing into juice and wine and nutraceutical products as well. To gain a better understanding of flavonoid biosynthesis and help develop value added products and better cultivars with greater health benefits, we analyzed total flavonoid content(TFC), composition, and radical scavenging activities in fruit extracts of 16 Chinese dwarf cherry genotypes. Fruit peel TFC ranged from 33.5 to72.8 mg/g REáFW(RE: rutin equivalent, FW: fresh weight)while fruit flesh TFC ranged from 4.3 to 16.9 mg/g REáFW.An HPLC analysis revealed that fruit extracts contained 14 flavonoids with considerable variation in their profiles across genotypes. The most abundant flavonoids in most genotypes were proanthocyanidin B1(PA-B1), proanthocyanidin B2(PA-B2), phloretin 20-O-glucoside(PG), and phloretin 20,40-O-diglucoside(PDG). Principal component analysis showed that PG, PA-B1, and PA-B2 had large,positive factor loading values in the first principal component for each genotype. Increased scavenging activity of2,2-diphenyl-1-picrylhydrazyl(DPPH) radicals was apparent in genotypes ‘Nongda 4', ‘Nongda 3', ‘Nongda 6',‘Wenfenli', and '10-32', suggesting promising applications in the production of nutraceutical products. In summary, our results will aid in breeding, fruit processing, and developing medicinal uses of the Chinese dwarf cherry. | Pengfei Wang Xiaopeng Mu Junjie Du Yu Gary Gao Donghai Bai Luting Jia Jiancheng Zhang Haiyan Ren Xiaofang Xue | 2018 | Journal of Forestry Research2018，29，1： | 8 |
| 7 | Atorvastatin attenuates surgery-induced BBB disruption and cognitive impairment partly by suppressing NF-κB pathway and NLRP3 inflammasome activation in aged mice显示文摘In clinic,perioperative neurocognitive disorder is becoming a common complication of surgery in old patients.Neuroinflammation and blood-brain barrier(BBB)disruption are important contributors for cognitive impairment.Atorvastatin,as a strong HMG-CoA reductase inhibitor,has been widely used in clinic.However,it remains unclear whether atorvastatin could prevent anesthesia and surgery-induced BBB disruption and cognitive injury by its anti-inflammatory property.In this study,aged C57BL/6J mice were used to address this question.Initially,the mice were subject to atorvastatin treatment for 7 days(10 mg/kg).After a simple laparotomy under 1.5%isoflurane anesthesia,Morris water maze was performed to assess spatial learning and memory.Western blot analysis,immunohistochemistry,and enzyme-linked immunosorbent assay were used to examine the inflammatory response,BBB integrity,and cell apoptosis.Terminal-deoxynucleotidyl transferase mediated nick end labeling assay was used to assess cell apoptosis.The fluorescein sodium and transmission electron microscopy were used to detect the permeability and structure of BBB.The results showed that anesthesia and surgery significantly injured hippocampal-dependent learning and memory,which was ameliorated by atorvastatin.Atorvastatin could also reverse the surgery-induced increase of systemic and hippocampal cytokines,including IL-1β,TNF-α,and IL-6,accompanied by inhibiting the nuclear factor kappa-B(NF-κB)pathway and Nucleotide-Binding Oligomerization Domain,or Leucine Rich Repeat and Pyrin Domain Containing 3(NLRP3)inflammasome activation,as well as hippocampal neuronal apoptosis.In addition,surgery triggered an increase of BBB permeability,paralleled by a decrease of the ZO-1,occludin,and Claudin 5 proteins in the hippocampus.However,atorvastatin treatment could protect the BBB integrity from the impact of surgery,by up-regulating the expressions of ZO-1,occludin,and Claudin 5.These findings suggest that atorvastatin exhibits neuroprotective effects on cognition in aged mice undergoing surgery. | Pengfei Liu Quansheng Gao Lei Guan Yanting Hu Jingwen Jiang Teng Gao Weixuan Sheng Xinying Xue Hui Qiao Tianzuo Li | 2021 | Acta Biochimica et Biophysica Sinica2021，53，5： | 6 |
| 8 | Scale-Dependent Nature of Porosity and Pore Size Distribution in Lacustrine Shales: An Investigation by BIB-SEM and X-Ray CT Methods显示文摘Due to heterogeneous pore distributions within shales,petrophysical properties of shales determined by scanning electron microscopy(SEM) and X-ray computed tomography(CT) methods strongly depend on the observed domain size(analysis scale). In this paper,the influence of the analysis scale on areal and bulk porosities and pore size distribution(PSD) for lacustrine shales from the Dongying sag of Bohai Bay Basin,China were investigated using broad ion beam(BIB)-SEM and X-ray CT methods.The BIB-SEM cross-sections with high imaging resolution(10 nm/pixel) and a large field of view(>1 mm2)mainly describe the 2 D nanoscale pore system in the two shales(samples F41#-2 and Y556#-1),while CTbased 3 D reconstructions with resolutions of 0.42(F41#-1) and 0.5 μm/pixel(H172#-1) reflect the 3 D submicron pore system. The results indicate that the areal(bulk) porosity exhibits a multiple power-law distribution with increasing analysis area(volume),which can be used to extrapolate the porosity of a given area(volume). Based on SEM and CT investigations,the sizes of the minimum representative elementary areas(REAs) and volumes(REVs) were determined respectively,which are closely associated with the heterogeneousness of the pore system. Minimum REAs are proposed to be 2.93×10~4(F41#-2) and 0.91×10~4μm2(Y556#-1),and minimum REVs are 0.016(F41#-1) and 0.027 mm^3(H172#-1). As the analyzed areas(volumes) are larger than the minimum REA(REV),obtained 2 D(3 D) PSDs are comparable to each other and can be considered to reflect the shale PSD. These results provide insights into the porosity and PSD characterization of shales by SEM and X-ray CT methods. | Junqian Li Pengfei Zhang Shuangfang Lu Chen Chen Haitao Xue Siyuan Wang Wenbiao Li | 2019 | Journal of Earth Science2019，30，4： | 5 |
| 9 | Visible light-driven photocatalysis of W,N co-doped TiO_2显示文摘W,N co-doped TiO_2 nanoparticles were synthesized by a sol-gel method.The prepared samples were characterized by X-ray diffraction(XRD),field emission scanning electron microscopy(FE-SEM),transmission electron microscopy(TEM),Fourier transform infrared spectroscopy(FT-IR),X-ray photoelectron spectroscopy(XPS) and diffuse reflectance spectrophotometry(DRS).The results showed that the codoped photocatalysts were essentially uniform spherical particles with the smallest particle size of22.5 nm.Compared to un-doped TiO_2,N-TiO_2 and P-25,the absorption edge of the W,N co-doped TiO_2shifted to longer wavelength and its photocatalytic activity for degradation of methyl orange(MO) under Xe-lamp(350 W) was higher. | Xue Li Yunyi Liu Pengfei Yang Yongchao Shi | 2013 | Particuology2013，11，6： | 4 |
| 10 | ALM1, encoding a Fe-superoxide dismutase, is critical for rice chloroplast biogenesis and drought stress response显示文摘Chloroplasts are the center of plant life activities including photosynthesis,growth and development,and abiotic stress response.Chloroplast development and biogenesis in rice have been studied in detail,but how does abiotic stress affect chloroplasts is less studied.We obtained an albino mutant,alm1,whose chlorophyll content was greatly decreased.Transmission electron microscopy showed that chloroplast development in alm1 was blocked,especially in thylakoid-like structures,which could not form normally.The ALM1 gene encodes a chloroplast-localized superoxide dismutase.Full-length ALM1 successfully restored the non-albino phenotype,and in knockout lines,the albino phenotype reappeared.The ALM1gene is expressed mainly in young leaves.alm1 plants died as a consequence of excessive reactive oxygen accumulation after the third-leaf stage.A series of biochemical assays verified that ALM1 interacted with the OsTrxz protein,which is one of the components of plastid-encoded RNA polymerase (PEP) complexes.A western blot experiment indicated that ALM1 played an important role in stabilizing OsTrxz in rice.An overexpression test of ALM1 revealed that ALM1 can increase drought resistance by removing excess reactive oxygen in rice seedlings.This study suggests that ALM1 not only participates in rice chloroplast biogenesis,but also increases rice stress resistance by scavenging excess reactive oxygen. | Yanwei Wang Chen Deng Pengfei Ai Xue’an Cui Zhiguo Zhang | 2021 | The Crop Journal2021，9，5： | 4 |
| 11 | The effect of the ratio of standardized ileal digestible lysine to metabolizable energy on growth performance,blood metabolites and hormones of lactating sows显示文摘A total of 335 lactating sows (Landrace × Large White) were used in two experiments to determine the optimum ratio of standardized ileal digestible lysine (SID-Lys) to metabolizable energy (ME) for mixed parity sows during lactation. In Exp. 1, 185 sows (weighing an average of 256.2 ± 6.5 kg and having an average parity of 3.4 ± 0.3) were allocated to one of six experimental diets in a completely randomized block design within parity groups (1, 2, and 3+). The experimental diets were formulated to contain 3.06, 3.16, 3.20, 3.25, 3.30 or 3.40 Mcal/kg of ME and each diet was fed to the sows throughout a 28 day lactation. All diets provided a similar SID-lysine level (0.86%). As a result, the diets provided a SID-Lys:ME ratio of 2.81, 2.72, 2.69, 2.65, 2.61 or 2.53 g/Mcal ME. Sow feed intake was significantly (P < 0.01) affected by the energy content of the diet as well as by sow parity. Using regression analysis, feed intake was shown to be maximized at 3.25, 3.21, 3.21 and 3.21 Mcal/kg of ME for parity 1, 2, 3+ sows and the entire cohort of sows respectively (quadratic; P < 0.01). In addition, the result of feed intake can be expressed as 2.65, 2.69, 2.69 and 2.68 g/Mcal based on analysis of SID-Lys:ME ratio. Litter weight gain was affected by dietary treatment for parity 3+ sows and the entire cohort (P < 0.01). Based on regression analysis, litter weight gain was maximized at 3.25 and 3.24 Mcal/kg of ME for parity 3+ (quadratic; P < 0.01) and the entire cohort (quadratic; P < 0.01). Similarly, the result of litter weight gain could be expressed as 2.65 and 2.66 g/Mcal of SID- Lys:ME ratio. Therefore, 3.25 Mcal/kg of ME was selected for Exp. 2 in which 150 sows (weighing 254.6 ± 7.3 kg and having an average parity of 3.4 ± 0.4) were allocated to one of five treatments in a completely randomized block design within parity (1, 2, and 3+). The experimental diets were formulated to contain 2.1, 2.4, 2.7, 3.0 or 3.3 g/Mcal of SID-Lys:ME ratio with all diets providing 3.25 Mcal/kg of ME. The diets were fed to the sows throughout a 28 day lactation. Sow body weight loss was affected by dietary treatment (parity 3+ sows, P = 0.02; entire cohort, P < 0.01) and by sow parity (P < 0.01). Litter weight at weaning and litter weight gain were affected by dietary treatment for parity 1, 2, 3+ sows and the entire cohort (P < 0.01) as well as by sow parity (P < 0.01). Plasma urea nitrogen (P < 0.01), creatinine (P < 0.01) and non-esterifide fatty acids (P = 0.04) were decreased as the SID-Lys:ME ratio of the diet increased. Insulin-like growth factor-1 (P = 0.02), estradiol (P < 0.01) and luteinizing hormone (P = 0.02) were increased as the SID-Lys:ME ratio in diet increased. Based on a broken-line model, the estimated SID-Lys: ME ratio to maximize litter weight gain was estimated to be 3.05 g/Mcal. | Lingfeng Xue Xiangshu Piao Defa Li Pengfei Li Rongfei Zhang Sung Woo Kim Bing Dong | 2012 | Journal of Animal Science and Biotechnology2012，3，3： | 3 |
| 12 | Does propofol definitely improve postoperative cognitive dysfunction?-a review of propofol-related cognitive impairment显示文摘Postoperative cognitive dysfunction(POCD)is a common brain function-related complication after surgery.In addition to old age being an independent risk factor,anesthetics are also important predisposing factors.Among them,propofol is the most commonly used intravenous anesthetic in clinical practice.It has a rapid onset,short halflife,and high recovery quality.Many studies report that propofol can attenuate surgery-induced cognitive impairment,however,some other studies reveal that propofol also induces cognitive dysfunction.Therefore,this review summarizes the effects of propofol on the cognition,and discusses possible related mechanisms,which aims to provide some evidence for the follow-up studies. | Pengfei Liu Sheng Zhao Hui Qiao Tianzuo Li Weidong Mi Zhipeng Xu Xinying Xue | 2022 | Acta Biochimica et Biophysica Sinica2022，54，7： | 3 |
| 13 | Recent advances of carbon dots as new antimicrobial agents显示文摘Due to the COVID-19 pandemic,many rapid antimicrobial agents have developed intensively.Carbon dots(CDs),a new type of carbon-based nanomaterials,shows great potential against emerging infectious diseases and antimicrobial-resistant infections due to their unique optical properties,excellent biocompatibility,and easy surface modification.With the definition of the CDs structure and properties,synthesis,and characteristic technology improvement,the research on the CDs as antimicrobial agents has made significant progress.However,the lack of high repeatable and exact preparation methods,and the regular antimicrobial activity make it far from practical application.In this review,we summarize the most recent progress and challenges of CDs antimicrobial.First,an overview of the characteristics and properties is given,and the advantage of CDs applied to antimicrobial is further discussed.Then,it focuses on research progress on antimicrobial mechanisms under different conditions,the critical factors affecting their antimicrobial activity,and the practical antimicrobial applications.Finally,the main challenges and future research perspectives of antimicrobial CDs are proposed. | Pengfei Li Lu Sun Shanshan Xue Dan Qu Li An Xiayan Wang Zaicheng Sun | 2022 | SmartMat2022，3，2： | 3 |
| 14 | Effects of the standardized ileal digestible lysine to metabolizable energy ratio on performance and carcass characteristics of growing-finishing pigs显示文摘A total of 2,121 growing-finishing pigs (Duroc × Landrace × Large White) were utilized in six experiments conducted to determine the effects of different ratios of standardized ileal digestible lysine (SID-Lys) to metabolizable energy (ME) on the performance and carcass characteristics of growing-finishing pigs. Exps. 1 (30 to 50 kg), 2 (52 to 70 kg) and 3 (81 to 104 kg) were conducted to find an optimum ME level and then this level was used in Exps. 4 (29 to 47 kg), 5 (54 to 76 kg) and 6 (84 to 109 kg) to test the response of pigs to different ratios of SID-Lys:ME. In Exps.1 to 3, four treatments were used consisting of diets with a formulated ME content of 3.1, 3.2, 3.3 or 3.4 in Exps. 1 and 2 while Exp. 3 used 3.05, 3.15, 3.25 or 3.35 Mcal/kg. A constant SID-Lys:ME ratio of 2.6, 2.3 or 2.0 g/Mcal was used in Exps. 1, 2 and 3, respectively. Weight gain was significantly increased with increasing energy level in Exp.1 while weight gain was unaltered in Exps. 2 and 3. For all three experiments, feed intake was decreased (P < 0.05) and feed efficiency was improved (P < 0.05) with increasing energy level. Tenth rib back fat thickness linearly increased (P < 0.05) with increasing energy level. In Exps. 4 to 6, five treatments were used consisting of diets with a SID-Lys:ME ratio of 2.4, 2.6, 2.8, 3.0 or 3.2 in Exp. 1, 2.1, 2.3, 2.5, 2.7, 2.9 or 3.2 in Exp. 2 and 1.8, 2.0, 2.2, 2.4, or 2.6 in Exp. 3. A constant ME level 3.2, 3.2 and 3.05 Mcal/kg was used in Exps. 1, 2 and 3, respectively (selected based on the results of weight gain). For all three experiments, weight gain increased (P < 0.05) and feed efficiency improved linearly (P < 0.05) as the SID-Lys:ME ratio increased. Tenth rib back fat thickness linearly decreased (P < 0.05) as the SID-Lys:ME ratio increased. Based on a straight broken-line model, the estimated SID-Lys:ME ratio to maximize weight gain was 3.0, 2.43 and 2.2 for 29 to 47, 54 to76 and 84 to 109 kg of pigs, respectively. | Pengfei Li Zhikai Zeng Ding Wang Lingfeng Xue Rongfei Zhang Xiangshu Piao | 2012 | Journal of Animal Science and Biotechnology2012，3，1： | 3 |
| 15 | Low-Temperature Growing Anatase TiO2/SnO2 Multi-dimensional Heterojunctions at MXene Conductive Network for High-Efficient Perovskite Solar Cells显示文摘A multi-dimensional conductive heterojunction structure,composited by TiO2,SnO2,and Ti3C2TX MXene,is facilely designed and applied as electron transport layer in efficient and stable planar perovskite solar cells.Based on an oxygen vacancy scramble effect,the zero-dimensional anatase TiO2 quantum dots,surrounding on two-dimensional conductive Ti3C2TX sheets,are in situ rooted on three-dimensional SnO2 nanoparticles,constructing nanoscale TiO2/SnO2 heterojunctions.The fabrication is implemented in a controlled lowtemperature anneal method in air and then in N2 atmospheres.With the optimal MXene content,the optical property,the crystallinity of perovskite layer,and internal interfaces are all facilitated,contributing more amount of carrier with effective and rapid transferring in device.The champion power conversion efficiency of resultant perovskite solar cells achieves 19.14%,yet that of counterpart is just 16.83%.In addition,it can also maintain almost 85%of its initial performance for more than 45 days in 30–40%humidity air;comparatively,the counterpart declines to just below 75%of its initial performance. | Linsheng Huang Xiaowen Zhou Rui Xue Pengfei Xu Siliang Wang Chao Xu Wei Zeng Yi Xiong Hongqian Sang Dong Liang | 2020 | Nano-Micro Letters2020，12，3： | 3 |
| 16 | Hearing impairment-associated KARS mutations lead to defects in aminoacylation of both cytoplasmic and mitochondrial tRNA^(Lys)显示文摘Aminoacyl-tRNA synthetases(aaRSs)are ubiquitously expressed,essential enzymes,synthesizing aminoacyl-tRNAs for protein synthesis.Functional defects of aaRSs frequently cause various human disorders.Human KARS encodes both cytosolic and mitochondrial lysyl-tRNA synthetases(LysRSs).Previously,two mutations(c.1129 G>A and c.517 T>C)were identified that led to hearing impairment;however,the underlying biochemical mechanism is unclear.In the present study,we found that the two mutations have no impact on the incorporation of LysRS into the multiple-synthetase complex in the cytosol,but affect the cytosolic LysRS level,its tertiary structure,and cytosolic tRNA aminoacylation in vitro.As for mitochondrial translation,the two mutations have little effect on the steady-state level,mitochondrial targeting,and tRNA binding affinity of mitochondrial LysRS.However,they exhibit striking differences in charging mitochondrial tRNALys,with the c.517T>C mutant being completely deficient in vitro and in vivo.We constructed two yeast genetic models,which are powerful tools to test the in vivo aminoacylation activity of KARS mutations at both the cytosolic and mitochondrial levels.Overall,our data provided biochemical insights into the potentially molecular pathological mechanism of KARS c.1129G>A and c.517T>C mutations and provided yeast genetic bases to investigate other KARS mutations in the future. | Yong Wang Jing-Bo Zhou Qi-Yu Zeng Siqi Wu Mei-Qin Xue Pengfei Fang En-Duo Wang Xiao-Long Zhou | 2020 | Science China(Life Sciences)2020，63，8： | 2 |
| 17 | An unexpected large continental source of reactive bromine and chlorine with significant impact on wintertime air quality显示文摘Halogen atoms affect the budget of ozone and the fate of pollutants such as hydrocarbons and mercury.Yet their sources and significances in polluted continental regions are poorly understood.Here we report the observation of unprecedented levels(averaging at 60 parts per trillion)of bromine chloride(BrCl)at a mid-latitude site in North China during winter.Widespread coal burning in rural households and a photo-assisted process were the primary source of BrCl and other bromine gases.BrCl contributed about 55%of both bromine and chlorine atoms.The halogen atoms increased the abundance of'conventional'tropospheric oxidants(OH,HO_(2) and RO_(2))by 26%-73%,and enhanced oxidation of hydrocarbon by nearly a factor of two and the net ozone production by 55%.Our study reveals the significant role of reactive halogen in winter atmospheric chemistry and the deterioration of air quality in continental regions where uncontrolled coal combustion is prevalent. | Xiang Peng Weihao Wang Men Xia Hui Chen A.R.Ravishankara Qinyi Li Alfonso Saiz-Lopez Pengfei Liu Fei Zhang Chenglong Zhang Likun Xue Xinfeng Wang Christian George Jinhe Wang Yujing Mu Jianmin Chen Tao Wang | 2021 | National Science Review2021，8，7： | 2 |
| 18 | Epstein-Barr 病毒的从潜伏的膜蛋白质 2 的重叠 epitopes (LMP2 ) 的空想地熔化的抗原富人作为一支潜在的疫苗和诊断代理人显示文摘Epstein-Barr 病毒(EBV ) 在全世界是流行的并且在人与几恶意的疾病被联系。(LMP2 ) 潜伏的膜蛋白质 2 在联系 EBV 的 tumors; 的致病 EBV 起一个关键作用;因此, LMP2 被认为是一个潜在的 immunodiagnostic 和 immunotherapeutic 目标。multi-epitope-based 抗原是为治疗学的疫苗的一种有希望的选择并且如此的恶意诊断。在这研究,我们系统地屏蔽了细胞毒素的 T 淋巴细胞(CTL ) ,助手 T 房间(Th ) 和在用生物信息学的 EBV-LMP2 以内的 B 房间 epitopes。基于屏幕,在 T 房间和 B 房间的重叠 epitopes 的二个肽富人被选择构造为叫作 EBV-LMP2m 的妄想的 multi-epitope 蛋白质包含顺序的 plasmid,它 LMP2aa195~232 和 LMP2aa419~436 是镇静的。EBV-LMP2m 蛋白质在 E 被表示。在原核生物的 codon 优化以后的 coli BL21 (DE3 ) 。在 BALB/c 老鼠的净化的妄想的抗原的接种在阴道粘液而且特定的 CTL 回答在浆液和能分泌的 IgA 导致了特定的 IgG 的高水平不仅。由把净化的 EBV-LMP2m 用作抗原,在 202 鼻咽的癌(NPC ) 的浆液标本的特定的 IgG 的存在病人们有效地与 52.84 % 被检测;敏感和 95.40 %特性,基于 VCA-IgA 在传统的察觉方法上代表改进, 60.53 %敏感和 76.86 %特性) 。上述结果显示 EBV-LMP2m 可以为 NPC 病人为联系 EBV 的肿瘤而且一个诊断代理人被用作潜在的目标抗原不仅。 | Xiaoyun Lin Shao Chen Xiangyang Xue Lijun Lu Shanli Zhu Wenshu Li Xiangmin Chen Xiaozhi Zhong Pengfei Jiang Torsoo Sophia Sename Yi Zheng Lifang Zhang | 2016 | Cellular & Molecular Immunology2016，13，4： | 2 |
| 19 | The biology of bone morphogenetic protein signaling pathway in cerebrovascular system显示文摘Bone morphogenetic protein belongs to transcription growth factor superfamilyβ;bone morphogenetic protein signal pathway regulates cell proliferation,differentiation,and apoptosis among different tissues.Cerebrovascular system supplies sufficient oxygen and blood into brain to maintain its normal function.The disorder of cerebrovascular system will result into serious cerebrovascular diseases,which is gradually becoming a major threat to human health in modern society.In recent decades,many studies have revealed the underlying biology and mechanism of bone morphogenetic protein signal pathway played in cerebrovascular system.This review will discuss the relationship between the two aspects,aiming to provide new perspective for non-invasive treatment and basic research of cerebrovascular diseases. | Haishuang Tang Xiaoxi Zhang Gaici Xue Fengfeng Xu Qingsong Wang Pengfei Yang Bo Hong Yi Xu Qinghai Huang Jianmin Liu Qiao Zuo | 2021 | Chinese Neurosurgical Journal2021，7，4： | 2 |
| 20 | A new strategy to achieve enhanced upconverted circularly polarized luminescence in chiral perovskite nanocrystals显示文摘Achieving large luminescence dissymmetry factors(pium)is challenging in the research field of circularly polarized luminescence(CPL).While various approaches have been developed to construct organic systems with CPL activity,there is still a lack of effective methods for fabricating CPL active inorganic materials.Herein,we propose an approach for endowing upconversion nanoparticles(UCNPs)and perovskite nanocrystal(PKNC)hybrid nanomaterials with upconverted circularly polarized luminescence(UC-CPL)activity.Chiral cesium lead bromides(CsPbBr_(3))PKNCs were synthesized by a chiral-ligand-assistant method.Meanwhile,UCNP could be embedded into the chiral PKNC,enabling a photon upconvesion feature to the PKNC.The embedded UCNPs in PKNCs were confirmed by electron tomography.Consequently,various CPL activities,including prompt CPL,UC-CPL,and energy transfer enhanced circularly polarized luminescence(ET-CPL),were realized.The chiral perovskite nanocrystals could reabsorb the chiral energy generated from UCNPs,showing energy transfer enhanced CPL activity with four times magnification of the circular polarization.These findings provide a meaningful strategy for designing chiral photon upconversion inorganic nanomaterials with highly efficient UC-CPL activity. | Xue Jin Minghao Zhou Jianlei Han Bin Li Tianyong Zhang Shuang Jiang Pengfei Duan | 2022 | Nano Research2022，15，2： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员